Apparatus for removing boiler impurities and for preventing boiler scale



2 K 2 E 9 M 1 s .m t M1. 4 e m #N m 5/ W Q h e H m 3 C, w m y O T WW1 T 1. O Z w m w z m a d A m i F Feb. 19, 1 935. APPARATUS F 'OR REMOVING BOILER IMPURITIES AND FOR PREVENTING BOILER S Feb. 19, 1935. A. CZECZOTT 1,991,922

APPARATUS FOR REMOVING BOILER IMPURITIES AND FOR PREVENTING BOILER SCALE Filed July 10, 1950 2 Sheets-Sheet 2 '9 o oo o 000 9 o o v o 00 000 oo oo oo oo oo 0 9 00 000 ooo 5 the most prejudicial substances.

Patented Feb. 19, 1935 PATENT OFFICE APPARATUS FOR REMOVING @BorLER 1M PURITIES AND FOR PREVENTING BOILER SCALE Albert Ozeczott, Warsaw,Poland Application July 10, 1930, Serial No. 467,114;

July 19, 1929 In Poland realms. (01.12.2-381 7 Boiler scale and other deposits and impurities in boilers consist of substances ofdiiferent characters, which are unequally distributed, and hence such substances require treatments for their elimination. In order to entirely prevent the formation of such deposits and theirprejudicial effect upon the functioning and preservation ofboilers, my methods as further indicated must be periodically put in use, and when they are properly applied, the usual washing of boilers can be dispensed with. i

In order to obtain a satisfactory result, the following operations must beperformed.

l. The thin upper layer of the boiler water must be frequently removed, in small quantities as being the most contaminated and in fact by This removal takes place while the boiler is in operation, and before the substances composing the scale are allowed to deposit uponthe boiler surface after the ebullition has ceased.

2. Another removingoperation is necessary for the expulsion of all softdeposits or sludge of a less prejudicial nature, which collect at the bottom of the boiler after it has ceased working, that is, as soon as the energetic circulation of the mass of water has stopped. This removal may even be effected under pressure, but after a longer period of functioning, for instance a days work.

3. It is quite necessary to proceed with an entire and periodic removal of the water, as'this counteracts the continually increased concentration of salts which are dissolved in the whole amount of water in the boiler, and which could not be removed by the preceding operations. The water is changed according quired for the usual washing. carried out under pressure, but

This operation is on condition that not by the usual drain cocks positioned at the lower part of the furnace, but by the special cock serving for the removal of small quantities at the top of the boiler, for otherwise, as the clean water supplied at the same time by the injector is colder, it will descend to the remain therein, renewed.

When operating upon this plan, and. on condition of a regular functioning of the apparatus to be further described which are specially adapted for these operations, the boiler will work without the stops which are required for the ordinary washing, and hence the relief of the pressure will only be necessary for inspection or reso that the water is not in fact to the periods re-' bottom of the boiler and will not the boiler pressure.

pairs, which however need only to take place after much longer working periods than in usual practice.

The accompanying drawings show an embodiment of the invention.

A Fig. 1 is a lengthwise section of a boiler provided with theapparatus. A

Fig. 2, is acorresponding cross section.

Fig. 3 is a horizontal section.

Fig. 4 isa lengthwise sectionof the drain cock. 10

Fig. 5 is a corresponding side view.

Figs. 6 and 7 are like views of a water-outlet cock. f

The apparatus for evacuating the impurities of the upper layer of water consists of one or more troughs A secured. to a float P. An aperture is pierced in the bottom of each trough, and all the apertures are connected, by short tubes, to a somewhat elastic tube 0 which runs along the boiler and leads to a drain cock V. The float is suspended in the boiler from a vertical hook B, in such manner that the apparatus will rise and fall with the water level in the boiler. One edge of the trough A is lower than the other, so that the trough will always be somewhat submerged in the foamy water of the upper layer of the boiler, and only in the direction of the natural circulation of this layer.

The foamy water collects in the trough A, and when cock V is opened, the collected sediment will be driven out by the steam pressure.

The essential details for the construction of the float are as follows.

A. In order to allow a certain amount of a liquid to enter the float, one or more small apertures are formed in the upper part of the float body, and each opening is connected in a fluid tight manner'with a fluidfilling pipe.

B. A pressure gauge, connected to the inside of the float, is mounted on the outside of the boiler. 40

C. The liquid used in the float should have such. composition (alcohol, benzine, etc. mixed with water) that its boiling point is below that of water, or less than 100? C.

By this arrangement, after the boiler is put the interior of the float will be subject to a pressure which sufficiently exceeds This difference of pressure will increase the resistance of the float P body to the outer pressure which tends to crush or damage the float. 7

Should the said float, having failed to work, be submergedon account of leakage, this will at' once be indicated by the said pressure gauge 7 which communicates with the inside of the float,

gauge shows a pressure which is indicated by the boiler pressure drives it damage. I Y i To evacuate the sludge deposited'on thebottom of the boiler after-its work has been peremploy a water-outlet cock or valve such cocks or the lgnown construction usually fail to worlg. as they are obstructedby particles of 'matter situated below the clack disk,

ting blade R s o that when the valve isioperated,

automatically thus cleaning the passage.

Said cutting blade is rotated bya tooth Z'formin a f a i" Krwh gll hen e l r K is r ed meet n ot tes? t othe h e t m unted on. h st m o the; v e and t ls is a longitudinal recess 11. in which the coarser such are then tightly on its seat. The water-outlet cocks may h mad i o e o m nie e whi h a e wtably unt d a t e lev art9! t s bel e I claim: 7

1 An apparatus for removing the deposits contained in the upper layers err-seeding the boiler pressure.

' 2. An apparatus as acterized by the provision of means for indicat- V 20 wire is also broken thereby releasing the i-stem an'd indicating the damage. V w v 3; An apparatus as claimed in claim 1 sized by-the provision.

sitione d externally of the with saidmeans for introducing a liquid intosaid float. I Y 4. Apparatus floating scum collector with the front edge dl-=' 

